Nothing. Word is getting around about how to do this. I anticipate that in another couple of years it'll have diffused to everyone, except the constant crew of new younglings who have to find out and be told about it from their older siblings and such.

"AI detection" wasn't even a solution in the short term and it won't be going forward. Take-home essays are dead, the teachers are collectively just hoping some superhero will swoop in and somehow save them. Sometimes such a thing is possible, but it isn't going to happen this time.

Yes. The ship has sailed and in fact it sailed away many, many years ago. Modernity now has to reckon with Brandolini's law at the scale of these AI systems, which, depending on the system you're inside of, can vary from "this is easy to refute" to "don't bother, assume it's all bullshit."

I wonder if doing this would actually be a step closer to learning (from not doing anything at all). To put it in your own style, you are forced to read the output and probably understand the basic concepts of what the LLM provides

Probably so, assuming that what it spits out is actually real and not some hallucination, but that's not at all a given. And I also assume that the people most inclined to regurgitating what an LLM spits out are also heavily overlapped with the people who are least likely to verify that the information is correct, or verify primary sources, or even think to ask for sources in the first place.